Make all global private symbols own symbols.

src/array-iterator.js

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 'use strict';
 
 
 // This file relies on the fact that the following declaration has been made
 // in runtime.js:
 // var $Array = global.Array;
@@ skipping 32 matching lines @@
 // 22.1.5.2.2 %ArrayIteratorPrototype%[@@iterator]
 function ArrayIteratorIterator() {
     return this;
 }
 
 
 // 15.4.5.2.2 ArrayIterator.prototype.next( )
 function ArrayIteratorNext() {
   var iterator = ToObject(this);
 
-  if (!HAS_PRIVATE(iterator, arrayIteratorObjectSymbol)) {
+  if (!HAS_DEFINED_PRIVATE(iterator, arrayIteratorNextIndexSymbol)) {
     throw MakeTypeError('incompatible_method_receiver',
                         ['Array Iterator.prototype.next']);
   }
 
   var array = GET_PRIVATE(iterator, arrayIteratorObjectSymbol);
   if (IS_UNDEFINED(array)) {
     return CreateIteratorResultObject(UNDEFINED, true);
   }
 
   var index = GET_PRIVATE(iterator, arrayIteratorNextIndexSymbol);
@@ skipping 84 matching lines @@
 macro EXTEND_TYPED_ARRAY(NAME)
   %AddNamedProperty($NAME.prototype, 'entries', ArrayEntries, DONT_ENUM);
   %AddNamedProperty($NAME.prototype, 'values', ArrayValues, DONT_ENUM);
   %AddNamedProperty($NAME.prototype, 'keys', ArrayKeys, DONT_ENUM);
   %AddNamedProperty($NAME.prototype, symbolIterator, ArrayValues, DONT_ENUM);
 endmacro
 
   TYPED_ARRAYS(EXTEND_TYPED_ARRAY)
 }
 ExtendTypedArrayPrototypes();